path: root/plugins/TopToolBar/_button.c

/*
Miranda IM
Copyright (C) 2002 Robert Rainwater

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/
#include "common.h"

// TODO:
// - Support for bitmap buttons (simple call to DrawIconEx())

static LRESULT CALLBACK MButtonWndProc(HWND hwnd, UINT  msg, WPARAM wParam, LPARAM lParam);

typedef struct {
	HWND    hwnd;
	int     stateId; // button state
	int     focus;   // has focus (1 or 0)
	HFONT   hFont;   // font
	HICON   arrow;   // uses down arrow
	int     defbutton; // default button
	HICON   hIcon;
	HBITMAP hBitmap;
	int     pushBtn;
	int     pbState;
	HANDLE  hThemeButton;
	HANDLE  hThemeToolbar;
	char	cHot;
	int     flatBtn;
} MButtonCtrl;


// External theme methods and properties
static HMODULE  themeAPIHandle = NULL; // handle to uxtheme.dll
static HANDLE   (WINAPI *MyOpenThemeData)(HWND,LPCWSTR);
static HRESULT  (WINAPI *MyCloseThemeData)(HANDLE);
static BOOL     (WINAPI *MyIsThemeBackgroundPartiallyTransparent)(HANDLE,int,int);
static HRESULT  (WINAPI *MyDrawThemeParentBackground)(HWND,HDC,RECT *);
static HRESULT  (WINAPI *MyDrawThemeBackground)(HANDLE,HDC,int,int,const RECT *,const RECT *);
static HRESULT  (WINAPI *MyDrawThemeText)(HANDLE,HDC,int,int,LPCWSTR,int,DWORD,DWORD,const RECT *);

static CRITICAL_SECTION csTips;
static HWND hwndToolTips = NULL;

int UnloadButtonModule(WPARAM wParam, LPARAM lParam) {
	DeleteCriticalSection(&csTips);
	return 0;
}

int LoadButtonModule(void) {
	WNDCLASSEX wc;
	
	ZeroMemory(&wc, sizeof(wc));
	wc.cbSize         = sizeof(wc);
	wc.lpszClassName  = MYMIRANDABUTTONCLASS;
	wc.lpfnWndProc    = MButtonWndProc;
	wc.hCursor        = LoadCursor(NULL, IDC_ARROW);
	wc.cbWndExtra     = sizeof(MButtonCtrl*);
	wc.hbrBackground  = 0;
	wc.style          = CS_GLOBALCLASS;
	RegisterClassEx(&wc);
	InitializeCriticalSection(&csTips);
	HookEvent(ME_SYSTEM_SHUTDOWN, UnloadButtonModule);
	return 0;
}

// Used for our own cheap TrackMouseEvent
#define BUTTON_POLLID       100
#define BUTTON_POLLDELAY    50

#define MGPROC(x) GetProcAddress(themeAPIHandle,x)
static int ThemeSupport() {
	if (IsWinVerXPPlus()) {
		if (!themeAPIHandle) {
			themeAPIHandle = GetModuleHandle("uxtheme");
			if (themeAPIHandle) {
				MyOpenThemeData = (HANDLE (WINAPI *)(HWND,LPCWSTR))MGPROC("OpenThemeData");
				MyCloseThemeData = (HRESULT (WINAPI *)(HANDLE))MGPROC("CloseThemeData");
				MyIsThemeBackgroundPartiallyTransparent = (BOOL (WINAPI *)(HANDLE,int,int))MGPROC("IsThemeBackgroundPartiallyTransparent");
				MyDrawThemeParentBackground = (HRESULT (WINAPI *)(HWND,HDC,RECT *))MGPROC("DrawThemeParentBackground");
				MyDrawThemeBackground = (HRESULT (WINAPI *)(HANDLE,HDC,int,int,const RECT *,const RECT *))MGPROC("DrawThemeBackground");
				MyDrawThemeText = (HRESULT (WINAPI *)(HANDLE,HDC,int,int,LPCWSTR,int,DWORD,DWORD,const RECT *))MGPROC("DrawThemeText");
			}
		}
		// Make sure all of these methods are valid (i would hope either all or none work)
		if (MyOpenThemeData
				&&MyCloseThemeData
				&&MyIsThemeBackgroundPartiallyTransparent
				&&MyDrawThemeParentBackground
				&&MyDrawThemeBackground
				&&MyDrawThemeText) {
			return 1;
		}
	}
	return 0;
}

static void DestroyTheme(MButtonCtrl *ctl) {
	if (ThemeSupport()) {
		if (ctl->hThemeButton) {
			MyCloseThemeData(ctl->hThemeButton);
			ctl->hThemeButton = NULL;
		}
		if (ctl->hThemeToolbar) {
			MyCloseThemeData(ctl->hThemeToolbar);
			ctl->hThemeToolbar = NULL;
		}
	}
}

static void LoadTheme(MButtonCtrl *ctl) {
	if (ThemeSupport()) {
		DestroyTheme(ctl);
		ctl->hThemeButton = MyOpenThemeData(ctl->hwnd,L"BUTTON");
		ctl->hThemeToolbar = MyOpenThemeData(ctl->hwnd,L"TOOLBAR");
	}
}

static TBStateConvert2Flat(int state) {
	switch(state) {
		case PBS_NORMAL:    return TS_NORMAL;
		case PBS_HOT:       return TS_HOT;
		case PBS_PRESSED:   return TS_PRESSED;
		case PBS_DISABLED:  return TS_DISABLED;
		case PBS_DEFAULTED: return TS_NORMAL;
	}
	return TS_NORMAL;
}

static void PaintWorker(MButtonCtrl *ctl, HDC hdcPaint) {
	if (hdcPaint) {
		RECT rcClient;
		GetClientRect(ctl->hwnd, &rcClient);
		
		// If its a push button, check to see if it should stay pressed
		if (ctl->pushBtn && ctl->pbState) ctl->stateId = PBS_PRESSED;

		// Draw the flat button
		if (ctl->flatBtn) {
			if (ctl->hThemeToolbar) {
				int state = IsWindowEnabled(ctl->hwnd)?(ctl->stateId==PBS_NORMAL&&ctl->defbutton?PBS_DEFAULTED:ctl->stateId):PBS_DISABLED;
                if (MyIsThemeBackgroundPartiallyTransparent(ctl->hThemeToolbar, TP_BUTTON, TBStateConvert2Flat(state))) {
					MyDrawThemeParentBackground(ctl->hwnd, hdcPaint, &rcClient);
				}
				MyDrawThemeBackground(ctl->hThemeToolbar, hdcPaint, TP_BUTTON, TBStateConvert2Flat(state), &rcClient, &rcClient);
			}
			else {
				HBRUSH hbr;
				
				if (ctl->stateId==PBS_PRESSED||ctl->stateId==PBS_HOT)
					hbr = GetSysColorBrush(COLOR_3DLIGHT);
				else {
					HDC dc;
					HWND hwndParent;

					hwndParent = GetParent(ctl->hwnd);
					dc=GetDC(hwndParent);
					hbr = (HBRUSH)SendMessage(hwndParent, WM_CTLCOLORDLG, (WPARAM)dc, (LPARAM)hwndParent);
					ReleaseDC(hwndParent,dc);
				}
				if (hbr) {
					FillRect(hdcPaint, &rcClient, hbr);
					DeleteObject(hbr);
				}
				if (ctl->stateId==PBS_HOT||ctl->focus) {
					if (ctl->pbState)
						DrawEdge(hdcPaint,&rcClient, EDGE_ETCHED,BF_RECT|BF_SOFT);
					else DrawEdge(hdcPaint,&rcClient, BDR_RAISEDOUTER,BF_RECT|BF_SOFT|BF_FLAT);
				}
				else if (ctl->stateId==PBS_PRESSED)
					DrawEdge(hdcPaint, &rcClient, BDR_SUNKENOUTER,BF_RECT|BF_SOFT);
			}
		}
		else {
			// Draw background/border
			if (ctl->hThemeButton) {
				int state = IsWindowEnabled(ctl->hwnd)?(ctl->stateId==PBS_NORMAL&&ctl->defbutton?PBS_DEFAULTED:ctl->stateId):PBS_DISABLED;
				if (MyIsThemeBackgroundPartiallyTransparent(ctl->hThemeButton, BP_PUSHBUTTON, state)) {
					MyDrawThemeParentBackground(ctl->hwnd, hdcPaint, &rcClient);
				}
				MyDrawThemeBackground(ctl->hThemeButton, hdcPaint, BP_PUSHBUTTON, state, &rcClient, &rcClient);
			}
			else {
				UINT uState = DFCS_BUTTONPUSH|((ctl->stateId==PBS_HOT)?DFCS_HOT:0)|((ctl->stateId == PBS_PRESSED)?DFCS_PUSHED:0);
				if (ctl->defbutton&&ctl->stateId==PBS_NORMAL) uState |= DLGC_DEFPUSHBUTTON;
				DrawFrameControl(hdcPaint, &rcClient, DFC_BUTTON, uState);
			}

			// Draw focus rectangle if button has focus
			if (ctl->focus) {
				RECT focusRect = rcClient;
				InflateRect(&focusRect, -3, -3);
				DrawFocusRect(hdcPaint, &focusRect);
			}
		}

		// If we have an icon or a bitmap, ignore text and only draw the image on the button
		if (ctl->hIcon) {
			int ix = (rcClient.right-rcClient.left)/2 - (GetSystemMetrics(SM_CXSMICON)/2);
			int iy = (rcClient.bottom-rcClient.top)/2 - (GetSystemMetrics(SM_CYSMICON)/2);
			if (ctl->stateId == PBS_PRESSED) {
				ix++;
				iy++;
			}
			DrawState(hdcPaint,NULL,NULL,(LPARAM)ctl->hIcon,0,ix,iy,GetSystemMetrics(SM_CXSMICON),GetSystemMetrics(SM_CYSMICON),IsWindowEnabled(ctl->hwnd)?DST_ICON:DST_ICON|DSS_DISABLED);
		}
		else if (ctl->hBitmap) {
			BITMAP bminfo;
			int ix,iy;

			GetObject(ctl->hBitmap, sizeof(bminfo), &bminfo);
			ix = (rcClient.right-rcClient.left)/2 - (bminfo.bmWidth/2);
			iy = (rcClient.bottom-rcClient.top)/2 - (bminfo.bmHeight/2);
			if (ctl->stateId == PBS_PRESSED) {
				ix++;
				iy++;
			}
			DrawState(hdcPaint,NULL,NULL,(LPARAM)ctl->hBitmap,0,ix,iy,bminfo.bmWidth,bminfo.bmHeight,IsWindowEnabled(ctl->hwnd)?DST_BITMAP:DST_BITMAP|DSS_DISABLED);
		}
		else if (GetWindowTextLength(ctl->hwnd)) {
			// Draw the text and optinally the arrow
			char szText[MAX_PATH];
			SIZE sz;
			RECT rcText;

			CopyRect(&rcText, &rcClient);
			GetWindowText(ctl->hwnd, szText, sizeof(szText));
			SetBkMode(hdcPaint, TRANSPARENT);
			SelectObject(hdcPaint, ctl->hFont);
			// XP w/themes doesn't used the glossy disabled text.  Is it always using COLOR_GRAYTEXT?  Seems so.
			SetTextColor(hdcPaint, IsWindowEnabled(ctl->hwnd)||!ctl->hThemeButton?GetSysColor(COLOR_BTNTEXT):GetSysColor(COLOR_GRAYTEXT));
			GetTextExtentPoint32(hdcPaint, szText, lstrlen(szText), &sz);
			if (ctl->cHot) {
				SIZE szHot;
				
				GetTextExtentPoint32(hdcPaint, "&", 1, &szHot);
				sz.cx -= szHot.cx;
			}
			if (ctl->arrow) {
				DrawState(hdcPaint,NULL,NULL,(LPARAM)ctl->arrow,0,rcClient.right-rcClient.left-5-GetSystemMetrics(SM_CXSMICON)+(!ctl->hThemeButton&&ctl->stateId==PBS_PRESSED?1:0),(rcClient.bottom-rcClient.top)/2-GetSystemMetrics(SM_CYSMICON)/2+(!ctl->hThemeButton&&ctl->stateId==PBS_PRESSED?1:0),GetSystemMetrics(SM_CXSMICON),GetSystemMetrics(SM_CYSMICON),IsWindowEnabled(ctl->hwnd)?DST_ICON:DST_ICON|DSS_DISABLED);
			}
			SelectObject(hdcPaint, ctl->hFont);
			DrawState(hdcPaint,NULL,NULL,(LPARAM)szText,0,(rcText.right-rcText.left-sz.cx)/2+(!ctl->hThemeButton&&ctl->stateId==PBS_PRESSED?1:0),ctl->hThemeButton?(rcText.bottom-rcText.top-sz.cy)/2:(rcText.bottom-rcText.top-sz.cy)/2-(ctl->stateId==PBS_PRESSED?0:1),sz.cx,sz.cy,IsWindowEnabled(ctl->hwnd)||ctl->hThemeButton?DST_PREFIXTEXT|DSS_NORMAL:DST_PREFIXTEXT|DSS_DISABLED);
		}
	}
}

static LRESULT CALLBACK MButtonWndProc(HWND hwndDlg, UINT msg,  WPARAM wParam, LPARAM lParam) {
	MButtonCtrl* bct =  (MButtonCtrl *)GetWindowLong(hwndDlg, 0);
	switch(msg) {
		case WM_NCCREATE:
		{
			SetWindowLong(hwndDlg, GWL_STYLE, GetWindowLong(hwndDlg, GWL_STYLE)|BS_OWNERDRAW);
			bct = malloc(sizeof(MButtonCtrl));
			if (bct==NULL) return FALSE;
			bct->hwnd = hwndDlg;
			bct->stateId = PBS_NORMAL;
			bct->focus = 0;
			bct->hFont = GetStockObject(DEFAULT_GUI_FONT);
			bct->arrow = NULL;
			bct->defbutton = 0;
			bct->hIcon = NULL;
			bct->hBitmap = NULL;
			bct->pushBtn = 0;
			bct->pbState = 0;
			bct->hThemeButton = NULL;
			bct->hThemeToolbar = NULL;
			bct->cHot = 0;
			bct->flatBtn = 0;
			LoadTheme(bct);
			SetWindowLong(hwndDlg, 0, (LONG)bct);
			if (((CREATESTRUCT *)lParam)->lpszName) SetWindowText(hwndDlg, ((CREATESTRUCT *)lParam)->lpszName);
			return TRUE;
		}
		case WM_DESTROY:
		{
			if (bct) {
				EnterCriticalSection(&csTips);
				if (hwndToolTips) {
					TOOLINFO ti;

					ZeroMemory(&ti, sizeof(ti));
					ti.cbSize = sizeof(ti);
					ti.uFlags = TTF_IDISHWND;
					ti.hwnd = bct->hwnd;
					ti.uId = (UINT)bct->hwnd;
					if (SendMessage(hwndToolTips, TTM_GETTOOLINFO, 0, (LPARAM)&ti)) {
						SendMessage(hwndToolTips, TTM_DELTOOL, 0, (LPARAM)&ti);
					}
					if (SendMessage(hwndToolTips, TTM_GETTOOLCOUNT, 0, (LPARAM)&ti)==0) {
						DestroyWindow(hwndToolTips);
						hwndToolTips = NULL;
					}
				}
				LeaveCriticalSection(&csTips);
				DestroyTheme(bct);
				free(bct);
			}
			SetWindowLong(hwndDlg,0,(LONG)NULL);
			break;	// DONT! fall thru
		}
		case WM_SETTEXT:
		{
			bct->cHot = 0;
			if ((char*)lParam) {
				char *tmp = (char*)lParam;
				while (*tmp) {
					if (*tmp=='&' && *(tmp+1)) {
						bct->cHot = tolower(*(tmp+1));
						break;
					}
					tmp++;
				}
				InvalidateRect(bct->hwnd, NULL, TRUE);
			}
			break;
		}
		case WM_SYSKEYUP:
			if (bct->stateId!=PBS_DISABLED && bct->cHot && bct->cHot == tolower((int)wParam)) {
				if (bct->pushBtn) {
					if (bct->pbState) bct->pbState = 0;
					else bct->pbState = 1;
					InvalidateRect(bct->hwnd, NULL, TRUE);
				}
				SendMessage(GetParent(hwndDlg), WM_COMMAND, MAKELONG(GetDlgCtrlID(hwndDlg), BN_CLICKED), (LPARAM)hwndDlg);
				return 0;
			}
			break;
		case WM_THEMECHANGED: {
			// themed changed, reload theme object
			LoadTheme(bct);
			InvalidateRect(bct->hwnd, NULL, TRUE); // repaint it
			break;
		}
		case WM_SETFONT: // remember the font so we can use it later
		{
			bct->hFont = (HFONT)wParam; // maybe we should redraw?
			break;
		}
		case WM_PAINT:
		{
			PAINTSTRUCT ps;
			HDC hdcPaint;
			
			hdcPaint = BeginPaint(hwndDlg, &ps);
			if (hdcPaint) {
				PaintWorker(bct, hdcPaint);
				EndPaint(hwndDlg, &ps);
			}
			break;
		}
		case BM_SETIMAGE:
			if (wParam == IMAGE_ICON) {
				bct->hIcon = (HICON)lParam;
				bct->hBitmap = NULL;
				InvalidateRect(bct->hwnd, NULL, TRUE);
			}
			else if (wParam == IMAGE_BITMAP) {
				bct->hBitmap = (HBITMAP)lParam;
				bct->hIcon = NULL;
				InvalidateRect(bct->hwnd, NULL, TRUE);
			}
			break;
		case BM_SETCHECK:
			if (!bct->pushBtn) break;
			if (wParam == BST_CHECKED) {
				bct->pbState = 1;
                bct->stateId = PBS_PRESSED;
			}
			else if (wParam == BST_UNCHECKED) {
				bct->pbState = 0;
                bct->stateId = PBS_NORMAL;
			}
			InvalidateRect(bct->hwnd, NULL, TRUE);
			break;
		case BM_GETCHECK:
			if (bct->pushBtn) {
				return bct->pbState?BST_CHECKED:BST_UNCHECKED;
			}
			return 0;
		case BUTTONSETARROW: // turn arrow on/off
			if (wParam) {
				//if (!bct->arrow)
					//bct->arrow = (HICON)LoadImage(GetModuleHandle(NULL),MAKEINTRESOURCE(IDI_DOWNARROW),IMAGE_ICON,GetSystemMetrics(SM_CXSMICON),GetSystemMetrics(SM_CYSMICON),0);
			}
			else {
				if (bct->arrow) {
					DestroyIcon(bct->arrow);
					bct->arrow = NULL;
				}
			}
			InvalidateRect(bct->hwnd, NULL, TRUE);
			break;
		case BUTTONSETDEFAULT:
			bct->defbutton = wParam?1:0;
			InvalidateRect(bct->hwnd, NULL, TRUE);
			break;
		case BUTTONSETASPUSHBTN:
			bct->pushBtn = 1;
			InvalidateRect(bct->hwnd, NULL, TRUE);
			break;
		case BUTTONSETASFLATBTN:
			bct->flatBtn = 1;
			InvalidateRect(bct->hwnd, NULL, TRUE);
			break;
		case BUTTONADDTOOLTIP:
		{
			TOOLINFO ti;

			if (!(char*)wParam) break;
            EnterCriticalSection(&csTips);
			if (!hwndToolTips) {
				hwndToolTips = CreateWindowEx(WS_EX_TOPMOST, TOOLTIPS_CLASS, "", WS_POPUP, 0, 0, 0, 0, NULL, NULL, GetModuleHandle(NULL), NULL);
			}
			ZeroMemory(&ti, sizeof(ti));
			ti.cbSize = sizeof(ti);
			ti.uFlags = TTF_IDISHWND;
			ti.hwnd = bct->hwnd;
			ti.uId = (UINT)bct->hwnd;
			if (SendMessage(hwndToolTips, TTM_GETTOOLINFO, 0, (LPARAM)&ti)) {
				SendMessage(hwndToolTips, TTM_DELTOOL, 0, (LPARAM)&ti);
			}
			ti.uFlags = TTF_IDISHWND|TTF_SUBCLASS;
			ti.uId = (UINT)bct->hwnd;
			ti.lpszText=(char*)wParam;
			SendMessage(hwndToolTips,TTM_ADDTOOL,0,(LPARAM)&ti);
            LeaveCriticalSection(&csTips);
			break;
		}
		case WM_SETFOCUS: // set keybord focus and redraw
			bct->focus = 1;
			InvalidateRect(bct->hwnd, NULL, TRUE);
			break;
		case WM_KILLFOCUS: // kill focus and redraw
			bct->focus = 0;
			InvalidateRect(bct->hwnd, NULL, TRUE);
			break;
		case WM_WINDOWPOSCHANGED:
			InvalidateRect(bct->hwnd, NULL, TRUE);
			break;
		case WM_ENABLE: // windows tells us to enable/disable
		{
			bct->stateId = wParam?PBS_NORMAL:PBS_DISABLED;
			InvalidateRect(bct->hwnd, NULL, TRUE);
			break;
		}
		case WM_MOUSELEAVE: // faked by the WM_TIMER
		{
			if (bct->stateId!=PBS_DISABLED) { // don't change states if disabled
				bct->stateId = PBS_NORMAL;
				InvalidateRect(bct->hwnd, NULL, TRUE);
			}
			break;
		}
		case WM_LBUTTONDOWN:
		{
			if (bct->stateId!=PBS_DISABLED) { // don't change states if disabled
				bct->stateId = PBS_PRESSED;
				InvalidateRect(bct->hwnd, NULL, TRUE);
			}
			break;
		}
		case WM_LBUTTONUP:
		{
			if (bct->pushBtn) {
				if (bct->pbState) bct->pbState = 0;
				else bct->pbState = 1;
			}
			if (bct->stateId!=PBS_DISABLED) { // don't change states if disabled
				if (msg==WM_LBUTTONUP) bct->stateId = PBS_HOT;
				else bct->stateId = PBS_NORMAL;
				InvalidateRect(bct->hwnd, NULL, TRUE);
			}
			// Tell your daddy you got clicked.
			SendMessage(GetParent(hwndDlg), WM_COMMAND, MAKELONG(GetDlgCtrlID(hwndDlg), BN_CLICKED), (LPARAM)hwndDlg);
			break;
		}
		case WM_MOUSEMOVE:
			if (bct->stateId == PBS_NORMAL) {
				bct->stateId = PBS_HOT;
				InvalidateRect(bct->hwnd, NULL, TRUE);
			}
			// Call timer, used to start cheesy TrackMouseEvent faker
			SetTimer(hwndDlg,BUTTON_POLLID,BUTTON_POLLDELAY,NULL);
			break;
		case WM_TIMER: // use a timer to check if they have did a mouseout
		{
            if (wParam==BUTTON_POLLID) {
			    RECT rc;
			    POINT pt;
			    GetWindowRect(hwndDlg,&rc);
			    GetCursorPos(&pt);
			    if(!PtInRect(&rc,pt)) { // mouse must be gone, trigger mouse leave
				    PostMessage(hwndDlg,WM_MOUSELEAVE,0,0L);
				    KillTimer(hwndDlg,BUTTON_POLLID);
			    }
            }
			break;
		}
		case WM_ERASEBKGND:
			return 1;
	}
	return DefWindowProc(hwndDlg, msg, wParam, lParam);
}